Hello, Young-Jin,

> I was able to achieve the goal by (1) creating a script to change the
> text of one of the text objects and (2) creating "Button to fire to
> this script". But, I don't think this method is in sprite of Squeack,
> visual programming. I want to first create a button and make this
> button change the text of one of the text objects when this button is
> clicked, not the other way around. To me, this approach is in line of
> Squeak's philosophy.
>
> Can any one please explain what I have missed?

There are a quite a few different ways.

#1:

• For the "Button" from the supplies bin, get the halo for it.
• There is a pale green/blue handle near the bottom right corner.
• You'll get the scriptor that is invoked when you click it. (You can programatically invoke the button's action by sending "fire" command in the "button" viewer category.

#2:

• For any object, you can make it a button.
• Create a scriptor for an Etoys object.
• Hold the mouse button for a second on the "script status" that is showing "Normal" by default. You'll get a menu.
• From the menu, choose "mouseDown" or "mouseUp". The script will be executed when you do click on (or click on and release) the object.

-- Yoshiki

Actually, any script can produce a button to fire it, and also, any
object in Etoys can serve as a button (including text objects).

1. Suppose you have a text object named Text that contains some text:
'This is some text'.

Drag out Text's characters <- This is some text onto the desktop to
make a script.

Do it again to make a second script. Name the first script "reset"
and the second one "change".

Change the text in the "change" script.

These scripts can be tested by clicking on the (!).
A script will give you a button to fire it. Look at the menu item in
a script
[]

and choose the item button to fire this script.

Do this for the other script. Both of these buttons can be relabeled.

Here is what this example looks like
[]

2. You can also use any object as a button. Get out a rectangle. Put
an empty rectangle script on the desktop. Put the tiles:
Text's characters <- This is different text in this script. Now look
at the normal menu and choose mouseUp. This script will fire when
you do mouseUp on the rectangle object.

[]

You can make a toggle by adding a variable to hold true or false, etc.

Cheers,

Alan

At 05:18 PM 3/3/2007, Young-Jin Lee wrote:

>Hi,
>
>I am a newbie and trying to learn how to develop educational material
>using E-Toy.
>I went through several E-toy project, but still need some helps.
>
>In the test program I was writing, I put a few text objects and a
>Button object from "Supplies" tab. My object was to change the text of
>one of the text objects when the Button is clicked.
>
>First, I opened a Viewer for the Button object to figure out what
>kinds of things I can do to this Button object. I expected to find a
>method that will be invoked when the button object is clicked. To my
>surprise, there is no such method.
>
>I was able to achieve the goal by (1) creating a script to change the
>text of one of the text objects and (2) creating "Button to fire to
>this script". But, I don't think this method is in sprite of Squeack,
>visual programming. I want to first create a button and make this
>button change the text of one of the text objects when this button is
>clicked, not the other way around. To me, this approach is in line of
>Squeak's philosophy.
>
>Can any one please explain what I have missed?
>
>Thanks in advance.
>
>Young-Jin
>___________________________________

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